Robot arm



FIG. 1 is a front perspective view of the robot arm showing our new design;

FIG. 2 is a front elevational view of the robot arm;

FIG. 3 is a rear elevational view of the robot arm;

FIG. 4 is a right side elevational view of the robot arm;

FIG. 5 is a left side elevational view of the robot arm;

FIG. 6 is a top plan view of the robot arm; and,

FIG. 7 is a bottom plan view of the robot arm. 

CLAIM The ornamental design of a robot arm, as shown and described. 